21016720

素因数分解:

$2^4\times 5^1\times {\mathrm{262709}}^1$

素因数の和:262722

約数の個数: 20

約数和(自身を含む): 48864060

約数和(自身を除く): 27847340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 262709, 525418, 1050836, 1313545, 2101672, 2627090, 4203344, 5254180, 10508360, 21016720]

約数ペア:

[(1, 21016720), (2, 10508360), (4, 5254180), (5, 4203344), (8, 2627090), (10, 2101672), (16, 1313545), (20, 1050836), (40, 525418), (80, 262709)]